Abstract: The extraction of polysaccharides from rape pollen was studied. The effects of four factors such as times of extraction,time, ratio of solid-liquid and temperature were investigated. The results showed that the effect of temperature was the mostimportant, time was the second, times was the third, and the ratio of solid-liquid was the least. Through orthogonal test, theoptimum conditions of extraction were obtained on the basis of single factor test, as follows: ratio of solid-liquid 1:4, 90℃ for3h and 4 times extraction. The extraction percent of soluble polysaccharides was 1.450% on the optimum conditions.

Key words: rape pollen, polysaccharide, extraction